You might be right … but consider …
If American players are drawn to the big brands (as you are) – the question still arises … “Which big brand is best online?” I expect that players will go online to find out – and the brand that uses advertising / affiliates to help promote their story will win.
Outside the US – the “pull” and attraction of Vegas based properties is pretty small – they’re very late entrants into online play. So as you’ve suggested foreign markets is an option.
(which DO make up 95% of the world population)
:1circling